H3C LS-5500-28C-PWR-SI-OVS Installation Manual

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H3C LS-5500-28C-PWR-SI-OVS Installation Manual Manual pdf 48 page image

Installation ManualH3C S5500-SI Complete Series Ethernet Switches Chapter 3 Installing the Switch3-15Caution:z Make sure that the ground wire has been properly connected before powering onthe switch.z The length of the DC power cord must be less than 3 m (9.8 ft).3.2.3 Connecting the Ground WireCaution:Correctly connecting the switch ground wire is crucial to the lightning protection andelectromagnetic susceptibility (EMS) of your switch.The power input end of the switch is connected with a noise filter, whose central groundis directly connected to the chassis, forming the chassis ground (commonly known asPGND). This chassis ground must be securely connected to the earth ground so thatthe faradism and leakage electricity can be safely released to the ground, enhancingthe EMS capability of the switch. Ground your switch as follows:z When a grounding strip is available at the installation site, attach one end of theyellow/green ground wire of the switch to the grounding screw on the groundingstrip and fasten the captive nut. Note that the fire main and lightning rod of abuilding are not suitable for grounding the switch. The ground wire of the switchshould be connected to the grounding device for the equipment room.(1)(2)(3)(4)(1)(2)(3)(4)(1): Power input on the switch (2): Grounding screw on the switch(3): Protection ground wire (4): Grounding stripFigure 3-21 Ground the switch through a grounding stripz When there is no grounding strip but earth is available near the installation locationand allows a grounding body to be buried, hammer an angle iron/steel pipe longer